CN102192126A - Sealing structure of pneumatic pump piston - Google Patents
Sealing structure of pneumatic pump piston Download PDFInfo
- Publication number
- CN102192126A CN102192126A CN2010101195579A CN201010119557A CN102192126A CN 102192126 A CN102192126 A CN 102192126A CN 2010101195579 A CN2010101195579 A CN 2010101195579A CN 201010119557 A CN201010119557 A CN 201010119557A CN 102192126 A CN102192126 A CN 102192126A
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- piston
- pneumatic pump
- sealing structure
- sealing
- cylinder
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Abstract
The invention relates to a sealing structure of a pneumatic pump piston, belonging to the technical field of soft sealing. The sealing structure comprises an air cylinder, a piston and a sealing ring and is characterized in that the axial section cutting plane of the sealing ring is I-shaped; and a rectangular groove is arranged on a cylindrical surface of the piston. The sealing structure has the advantages of good sealing performance, little internal leakage, compact structure, small volume of a pump body and the like.
Description
Technical field
The present invention relates to a kind of pneumatic pump piston sealing structure, belong to the soft seal technical field.
Background technique
Piston sealing structure in the pneumatic pump is that two rectangle grooves are set on the external cylindrical surface of piston at present, places two O RunddichtringOs in the groove, utilizes the external diameter of O RunddichtringO and the compression applying of pneumatic pump inboard wall of cylinder block to realize the piston sealing between the cylinder chamber up and down.Because being compressed its axial cross section alteration of form of back, the O RunddichtringO is the semiellipse shape, therefore changed the monolateral action direction of the atmospheric pressure in the hyperbaric chamber to the O RunddichtringO, this action direction has increased the radial compression of O RunddichtringO, this radial compression directly lowered seal ring sealability, increased internal leakage.Be provided with two rectangle grooves on the external cylindrical surface of piston in addition, thereby increased the volume of pneumatic pump.Many the above, the piston sealing structure in the present pneumatic pump exists defectives such as the volume of poor sealing performance, the pump housing is big.Therefore design a kind of new pneumatic pump piston sealing structure, it is quite necessary making the pneumatic pump that its sealability is better, overall volume is littler.
Summary of the invention
At the technical deficiency that has seepage gas in the movement process on the sealing configuration between pneumatic pump piston and the cylinder, the present invention proposes a kind of pneumatic pump piston sealing structure.
To achieve these goals, the present invention takes following technological scheme to implement: it is made of cylinder, piston, seal ring.The axial cutting plane that it is characterized in that described seal ring is the I-shaped shape; A rectangle groove is set on the described outside piston cylinder.
Advantage such as the present invention has that good airproof performance, internal leakage are few, compact structure, pump housing volume are little.
Description of drawings
Accompanying drawing 1 is looked the sectional structure schematic representation for master of the present invention;
Accompanying drawing 2 is an I part-structure enlarged view in the accompanying drawing 1.
In the accompanying drawings: 1 cylinder, 2 seal rings, 3 pistons.
Embodiment
Shown in accompanying drawing 1,2, a ring-type rectangle groove is set on the external cylindrical surface of piston 3, the seal ring 2 that axial cutting plane is the I-shaped shape places the ring-type rectangle groove on piston 3 external cylindrical surfaces.When pressurized gas enter the epicoele of cylinder 1, promote piston 3 and move downward.Among high pressure air in this moment cylinder 1 epicoele enters seal ring 2 middle upper portion grooves along the slit of the inwall of cylinder 1 and piston 3 cylindricals, make the outer eaves both sides stress balance of the seal ring 2 that is the I-shaped shape, be unlikely the top that seal ring 2 is contacted with cylinder 1 and be compressed, produce seepage because of air pressure.When pressurized gas enter the cavity of resorption of cylinder 1, promote piston 3 and move upward.High pressure air in this moment cylinder 1 cavity of resorption enters along the slit of the inwall of cylinder 1 and piston 3 cylindricals and cuts open under seal ring 2 centres among the groove, make the outer eaves both sides stress balance of the seal ring 2 that is the I-shaped shape, be unlikely the top that seal ring 2 is contacted with cylinder 1 and be compressed, produce seepage because of air pressure.Because the end that the Cross section Design of seal ring 2 becomes the I-shaped shape to make seal ring 2 contact with cylinder 1 produces the trace rolling in the moment of piston 3 initial movements, guaranteed that seal ring 2 closely contacts with the inwall of cylinder 1 all the time, has realized the sealing in the movement process simultaneously.Because the design has lacked seal ring 2 one than traditional sealing, thereby has shortened the axial length of piston 3, thereby whole enough volumes of pneumatic pump in enhanced leaktightness, have been reduced.
Claims (2)
1. pneumatic pump piston sealing structure, it is made of cylinder, piston, seal ring, it is characterized in that the axial cutting plane of described seal ring is the I-shaped shape.
2. a kind of pneumatic pump piston sealing structure according to claim 1 is characterized in that being provided with on the described outside piston cylinder rectangle groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101195579A CN102192126A (en) | 2010-03-08 | 2010-03-08 | Sealing structure of pneumatic pump piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101195579A CN102192126A (en) | 2010-03-08 | 2010-03-08 | Sealing structure of pneumatic pump piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102192126A true CN102192126A (en) | 2011-09-21 |
Family
ID=44600827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101195579A Pending CN102192126A (en) | 2010-03-08 | 2010-03-08 | Sealing structure of pneumatic pump piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102192126A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536743A (en) * | 2012-03-12 | 2012-07-04 | 江苏锡压石化装备有限公司 | Two-way sealing structure for industrial vertical reciprocating compressor |
-
2010
- 2010-03-08 CN CN2010101195579A patent/CN102192126A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536743A (en) * | 2012-03-12 | 2012-07-04 | 江苏锡压石化装备有限公司 | Two-way sealing structure for industrial vertical reciprocating compressor |
| CN102536743B (en) * | 2012-03-12 | 2014-07-30 | 江苏锡压石化装备有限公司 | Two-way sealing structure for industrial vertical reciprocating compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110921 |